diff --git a/src/graphics_context.zig b/src/graphics_context.zig
index a77e00f..45e3b75 100644
--- a/src/graphics_context.zig
+++ b/src/graphics_context.zig
@@ -109,7 +109,7 @@ pub const GraphicsContext = struct {
             .application_version = vk.makeApiVersion(0, 0, 0, 0),
             .p_engine_name = app_name,
             .engine_version = vk.makeApiVersion(0, 0, 0, 0),
-            .api_version = vk.API_VERSION_1_2,
+            .api_version = vk.API_VERSION_1_3,
         };
 
         self.instance = try self.vkb.createInstance(&.{
diff --git a/src/main.zig b/src/main.zig
index ac48b66..cef4a9d 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -19,7 +19,7 @@ const Vertex = extern struct {
         .{
             .binding = 0,
             .location = 0,
-            .format = .r32g32_sfloat,
+            .format = .r32g32b32a32_sfloat,
             .offset = @offsetOf(Vertex, "pos"),
         },
         .{
@@ -30,20 +30,25 @@ const Vertex = extern struct {
         },
     };
 
-    pos: [2]f32,
+    pos: [4]f32,
     color: [3]f32,
 };
 
-const vertices = [_]Vertex{
-    .{ .pos = .{ -0.5, -0.5 }, .color = .{ 1, 0, 0 } },
-    .{ .pos = .{ -0.5, 0.5 }, .color = .{ 0, 1, 0 } },
-    .{ .pos = .{ 0.5, -0.5 }, .color = .{ 0, 0, 1 } },
-    .{ .pos = .{ 0.5, 0.5 }, .color = .{ 1, 1, 0 } },
-};
-
 const Index = u16;
 
-const indices = [_]Index{ 0, 2, 1, 1, 2, 3 };
+const vertices = [_]Vertex{
+    // Vulkan depth range is 0, 1 instead of OpenGL -1, 1
+    .{ .pos = .{ -0.5, -0.5, -0.5, 1.0 }, .color = .{ 1, 0, 0 } },
+    .{ .pos = .{ -0.5, 0.5, -0.5, 1.0 }, .color = .{ 0, 1, 0 } },
+    .{ .pos = .{ 0.5, -0.5, -0.5, 1.0 }, .color = .{ 0, 0, 1 } },
+    .{ .pos = .{ 0.5, 0.5, -0.5, 1.0 }, .color = .{ 1, 1, 0 } },
+    .{ .pos = .{ -0.5, -0.5, 0.5, 1.0 }, .color = .{ 1, 0, 0 } },
+    .{ .pos = .{ -0.5, 0.5, 0.5, 1.0 }, .color = .{ 0, 1, 0 } },
+    .{ .pos = .{ 0.5, -0.5, 0.5, 1.0 }, .color = .{ 0, 0, 1 } },
+    .{ .pos = .{ 0.5, 0.5, 0.5, 1.0 }, .color = .{ 1, 1, 0 } },
+};
+
+const indices = [_]Index{ 4, 5, 6, 6, 5, 7 };
 
 pub fn main() !void {
     if (c.glfwInit() != c.GLFW_TRUE) return error.GlfwInitFailed;
@@ -56,6 +61,8 @@ pub fn main() !void {
 
     var extent = vk.Extent2D{ .width = 800, .height = 600 };
 
+    c.glfwWindowHintString(c.GLFW_X11_CLASS_NAME, "floating_window");
+    c.glfwWindowHintString(c.GLFW_X11_INSTANCE_NAME, "floating_window");
     c.glfwWindowHint(c.GLFW_CLIENT_API, c.GLFW_NO_API);
     const window = c.glfwCreateWindow(
         @intCast(extent.width),
@@ -377,7 +384,7 @@ fn createPipeline(gc: *const GraphicsContext, layout: vk.PipelineLayout, swapcha
         .rasterizer_discard_enable = vk.FALSE,
         .polygon_mode = .fill,
         .cull_mode = .{ .back_bit = true },
-        .front_face = .clockwise,
+        .front_face = .counter_clockwise,
         .depth_bias_enable = vk.FALSE,
         .depth_bias_constant_factor = 0,
         .depth_bias_clamp = 0,
diff --git a/src/shaders/triangle.vert b/src/shaders/triangle.vert
index 2b8dfa5..f820750 100644
--- a/src/shaders/triangle.vert
+++ b/src/shaders/triangle.vert
@@ -1,11 +1,11 @@
 #version 450
 
-layout(location = 0) in vec2 a_pos;
+layout(location = 0) in vec4 a_pos;
 layout(location = 1) in vec3 a_color;
 
 layout(location = 0) out vec3 v_color;
 
 void main() {
-    gl_Position = vec4(a_pos, 0.0, 1.0);
+    gl_Position = a_pos;
     v_color = a_color;
 }